Door-latch



3 Sheets-Sheet 1.

T. BASON.

(No Model.)

DOOR LATCH.

Patented July 19, 1887.

INVENTOR BY J/(um/w ATTORNEYS.

WITNESSES W/Q 4262M (N0 Model.) 3 Sheets-Sheet 2. T. BASON.

DOOR LATCH.

No. 366,808. Patented July 19, 1887.

. c d g I U: I If I I S 3 L4 I I a? WITNESSES I INVENTOR Way/0Z4. 4%

-@JW -BY M 2 ATTORNEYS.

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3 Sheets-Sheet 3.

(No Model.)

T. BASON.

DOOR LATCH.

No. 366,808. Patented July 19,1887.

INVENTOR BY uh MA WITNESSES:

WQ/J

ATTORNEYS.

N. PETERS. Phala-Lflhographer, wmm mm 0.;

UNITED STAT S PATENT OFFICE.

THOMAS BASON, OF ENGLEWOOD, ILLINOIS.

DOOR-LATCH.

SPECIFICATION forming part of Letters Patent No. 366,808, dated July 19, 1887.

Application filed Ja nary 15, 18.57.

1?) all whom it may concern:

Be it known that I, THOMAS BASON, of Englewood, in the county of Cook and State of Illinois, have invented a new and Improved Door'Latch, of which the following is a full, clear, and exact description.

This invention relates to door-latches, the object of the invention being to provide an improved form of latch wherein the parts are so constructed and arranged that thelatch may be thrown into and out of engagement with the keeper by a simple pull upon the handle of the door.

To the end named the invention eonsists,essentially, of a pivotallymounted handle provided with a lever-arm that is arranged to engage with a spring-pressed latch or lockingbolt, as will be hereinafter more fully described, and specifically pointed out in the claims.

Reference is to be had to the accompanying -drawings, forming apart of this specification, in which similar figures of reference indicate corresponding parts in all the views.

Figure 1 is a face view of a portion of the door provided with my improved form of latch. Fig. 2 is a side view of a portion of the door. Fig. 3 is a sectional elevation taken on line 0:01 Fig. 2. Fig. 4 is a View of the interior of the latch, representing the same as it appears when arranged in connection with the door, the door being shown in section, and a portion of the latchcase cover being broken away in order to disclose the interior construction, the operating-levers, which are arranged in conmotion with the latch and connected to the handle, being also shown in section. Fig. 5

' is a sectional plan view taken on linezz of described. The rear walls of the central re- Serial No. 324,435. (No model.)

eess, 12, of the bolt are divided into sections, and these sections are inversely inclined, as shown at 2 and 3 in Fig. 5.

The bolt described is fitted within a case, 20, which may he of the form illustrated in the drawingsthat is, may be a combined lock and latch case-or the case might be a simple latch-case. The case is provided with an upwardly-extending post, 14-, while the bolt 10 is formed with an inwardly-extending post or projection, 15, about which there is coiled a spring, 16, that abuts against the post 14 and against the forward wall of the recess 12, as clearly shown in Fig. 4, the spring 16 acting to hold the bolt 10 in the position inwhich it is shown in said Fig. 4that is, acting to hold the bolt shot forward.

In connection with the latch described, I employ a handle, 30, that is carried by two arms, 31 and 32, said arms being respectively provided with a projection, 7 and 7, which projections fit within apertures formed in boxes 33 and 34. One of the boxes (the box 33, as shown in the drawings) is made integral with the faceplate 34, while the other box is formed with an upwardly-extending lug or projection, 4, which passes through an aperture, 5, that is formed in the plate, and bears against the inner end of said plate, the main body of the box being formed with a threaded socket to receive a screw, 6, which passes through the plate to engage with the box.

Upon the projection 7 of the upper arm of the handle there is fitted a lever-arm, 35, which arm is held against accidental displacement by a screw, 8, which passes up through the arm 31 and the projection 7 to engage with the lever 35, asbest shown in Fig. 3. On the projection 7 of the arm 32 there is formed a downwardly extending spur, 36, that fits within an apertured plate, 37, which said plate is in turn fixed to a spiral spring, 38, that is mounted within the box 34.

In order that thethrow of the handles 30 may be limited, I prefer to form the arms 31 and 32 with toes 39, which are arranged to strike against the face-plate 34, and so limit the throw of the handles. An inspection of the drawings will show that the handles may be secured to either side of the door, one handle being arranged above the other, so that the lever-arms 35 of the two handles will overlap, passing at this time through properly-arranged apertures .in the latch-case just in advance of the incline faces 2 and 3 of the rear wall of the bolt-recess 12.

From the construction described it will be seen that each handle may be operated independently of the other, and in closing the door the latch -bolt will work independently of the handle. The only strain upon the latch-bolt spring is that necessary to keep the said bolt projected forward,and consequently the spring may be made-light and flexible, so that it will work easily. WVhen the handles have been moved in the direction of the arrows shown in Fig. 5, so as to move their levers 35 in a direction to force the latch-bolt within the easing 20, the springs 38 will be put under tension, so that when the handles are released they will return the handles to'their normal position. I (Shown in Fig.5.)

If deemed advisable, a plain band-springsuch asthat shown in dotted lines in Fig. 4- may be used instead of the spring 16, and in case such flat spring is used I have found it desirable to groove the rear end of the bolt, so

that the spring will ,fit within the recess so 1 case, and as the direction of the pull required to throw thelatch is the same as that required to open the door the latch is almost automatic in its working. I

The latch may be adjusted by varying the length of the lever 35 to any thickness of door, and as the handle on the outside of the righthand door is the same as that on the inside of a left-hand door, and vice versa, the latch can be used on either right or left hand doors without alteration or adjustment; and it will ofeourse be understood that when it is desired to open the door from one side only but one handle need be employed, and that if it is desired to reverse from right to left, or vice versa, it can readily be done by taking off the removable boxes and changing the handles. The'handles can be arranged to operate the bolt from either'the upper or the lower arm by attaching the lever to either, as desired, so that when the latch is used in connection with a lock the key-hole maybe placed either above or below the handle.

The upright portion of the handle of such' a latch as has been described maybe made of any proper material, such as metal, glass,

same to its normal position, substantially as herein shown and described.

2. The combinatiomwjth a recessed bolt having its'rear walls-divided into two sections inversely inclined, and provided with a projection, 15, and the spring 16 on said projection, of the handle-30, provided with pivots .7 and 7, the pivots 7 being provided with the ex tensions 36, the levers 35, connected to the pivot 7 of the handles, and the springs 38 on the extensions 36 of the pivots 7, substantially as herein shown and described.

3. The combination, with a sliding bolt formed with a central recess, of a spring arranged within said recess, a handle carried by two arms that are mounted in boxes and connected to a face-plate, a lever-arn1 extending through the sliding bolt and connected to one of the handle-arms, a spur, 36, connected to the other handlearm, a plate, 37, with which the spur 36 engages, and a spring, 38, connected to the plate, substantially as described.

' THOMAS BASON.

\Vitncsses: V

T. W. VVAKELEE, S. D. UNDERwooD. 

